Music-leaf turner.



J. A. PRIEDRIGHS. MUSIC LEAF TURNER.

APPLIGATION FILED JUNE s, 1907.

Patented .191912, 1909.

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J. A. PRIEDRIGHS.

MUSIC LEAI' TURNER.

APPLIUATION FILED JUNE a, 1907.

909,391 Patented Ja,n12,1909.

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UNITED sTA'rns JULiUs A. Faianaicns, or MNIQATO, MINNESOTA.

MUSIC-LEAF TURNER.

To all whom it may Vconce/Mt:

Be it known that I, Julius A. FRIED- ;aicns, a citizen ofthe United States, residing at Mankato, in the county of Blue Earth and State of Minnesota, have invented certain nevT and useful Improvements in Music-Leaf Turners; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the saine.

My invention has for its object to provide a simple, convenient and efficient music leaf turner, and to this end it consists 0f the novel devices and combinations of devices hereinafter described and defined in the claim.

The improved music leaf turner in what I at present believe to be'the preferred form, is illustrated in the accompanying drawings,

whereinjlike vcharacters indicateA like prtsp throughout the Aseveral views.'

Referring tothe drawings, Figure 1. is a view in front elevation, showing the improved leaf turner applied in working position. Fig. 2 is abottom plan view of the improved leaf turner. Fig. 3 is a fragmentary detail looking at the back of a portion of the device. Fig. 4 is a detail in section taken on the line fc4 :r4 of Fig. 1. Fig. 5 is a fragmentary detail in section on the line x5 055 of Fig. 1. Fig. 6 is a transverse section taken on the line :v6 at? of Fig. 5.' Fig. 7 is a detail in section taken on the line @c7067 of Fig. 1. Fig. 8 is a bottom plan'view. of ythe parts shown in Fig. 5. Fi. 9 is a section taken approximately on t ie line zr* of Fig. 1. Fig. 10 is a section taken on the line x17 x10 of Fig, 9. Fig. 11 i's a side elevation of the part-s shown in Fig. 9, some parts being broken away and some parts being sectioned. Fig. 12 is a detail in transverse section on the line x12 x12 of Fig. 1. Fig. 13 is a detail in section taken on the line x13 x13 of Fig. 1, some parts being rernoved and some being broken away; and

Fig. 14 is a rear elevation showing the lower intermediate portion of the holder, some parts being broken away.

The frame of the device is made up chiefly of a horizontal base bar 1 and an upright channel bar or standard 2, both of which members are preferably stamped from thin sheet metal and are made channel shaped. The base bar 1 is provided with padded feet or rest lugs 3 (see Vparticularly Figs. 1 and 4) that are adapted to rest upon one of the ribs of the folding key cover 4 of a piano of stand- Specifcation of Letters Patent.

Application filed June 3, 1907.

Patented Jan. 12, 1909. serial No. 377,061. 'Y

ard construction. The standard 2 is provided with an eXtensible clamping `head that is adapted to engage a groove in the top or cover 5 of the piano. This clam ing head is preferably formed by the crooke upper portion 6 of a light rod which has depending parallel legs 7 that work through suitable guides 8 and 8a located within the back or channel of the standard 2. A coiled spring 9 applied around one of the rod legs 7 reacts against one of the guides 8 and against a in 7EL in one of the legs 7, and thus yielding y holds the clamping heads 5 -pressed against the cover 5.

` That portion of the head 6 which engages the cover 5 is preferably covered with a section of rubber tubing 5a to prevent marring of the said cover.

The two principal parts 1 and 2 of the `frame just described are preferably made detachable SQ that they may be Pked lfl. small space, and for this purpose.thelovver` end of the standard 2 is preferably bifurcated or formed with prongs 2a that 'are adapted to be slid with close frictional engagement through slots cut in the upper flange of the base bar 1 and between guide clips 11 secured to the back and within the channel of the said base bar 1, as best shown in Fig. 14.

The bound or folded edge of the music book'or the loosely connectedleft handedges of. the several pages containing the'r'nusical composition are adapted to be clamped by and between a pair' of clamping blades 12 and 13A, both of which extend longitudinally of the standard 2, andthe fQlllejf 0f Wllll iS. rigidly secured theretofwhile the latter is spring mounted on the said standard and capable of lateral movements toward and from the said blade 12. 'Preferably said.

movable blade 13 is provided with projectin hinge lugs 13a that extend through suitabile passages in the standard 2 and are pivotally connected to ears 14 located at the back and within the channel of said standard and, as shown, project laterally therefrom. A coiled spring l5 reacts ,against the back of the standard 2 and against one of the hinge lugs 13a with a 'force that yieldingly presses the clamping blade 18 against or toward the cooperating clamping blade 12.

For the purpose of readily moving the blade 1-3"away from the blade 12, said blade 13 is provided with a projecting fingeriece 16, and the standard 2 is provided wit an alined finger-piece 17. As is evident, when the finger-piece 16 is pressed toward the finger-piece 17 by engaging the one with a finger and the other with a thumb, the blade 13 may be moved away from the blade 12 against the tension of the spring 15, so as to open the clamping blades for the admission of the edge of the book or leaves.

For the Vpurpose of moving the leaves in succession from the right toward the left, l provide a multiplicity of pivoted spring actuated arms and an escapement mechanism for successively releasing the same. ln the drawings, three of these carrier arms are rovided, but in practice any desired number thereof may be used. These carrier arms 18 may be in the form of light rods or small metal tubes, and at their inner ends they are independently secured to the annular flanges 19 of disks or wheels 2O loosely journaled on 20 a non-rotary stub shaft 21, the ends of which, as shown, are square and seated in laterally spaced bearing lugs 22 on the face of the base bar 1. As shown, one of the bearing lugs 22 is pressed from the central 25 portion of the base bar 1, and the other is detachably secured thereto, as shown, by a short nutted bolt 23. Within each annular flange 19 is a s iral spring 24, the inner end of which is anc ored to the non-rotary shaft 21, and the outer end of which is attached to the cooperating annular flange 19. These s rings 24 eXert a force which tends to move t e carrier arms 18 in a direction from the left toward the right with respect to Figs. l, 2, 5 and 9, which is the proper direction of movement for turning the leaves, one after the other.

To the free end of each carrier arm 18 is applied a pair of spring closed grap le aws 25 that yare adapted to pinch and lIfold the lower free portion of one of the leaves to be turned, as shown in Fig. 1.

Normally, all the carrier arms 18 are held in position to the right by means of an escapement device of novel construction, and

which escapement device is preferably constructed substantially as shown in the drawings. A vibratory retaining hook 26 which constitutes one of the members of the escapement is extended through a suitable passage 1EL in the right hand side of the base bar 1, and is pivoted on a short rock shaft 27 which, in turn, is mounted in the upper and lower flanges of said base bar. This rock shaft 27 is provided with a projecting trip arm 28 and with a secondary escapement hook 29, both of which parts are movable with the said rock shaft. The secondary escapement hook 29 also Works through the passage 1a and normally engages with a lug 30 on the lower portion of the primary escapement hook 26. he laterally bent up per end of the escapement hook 29 terminates slightly below a stop shoulder 31 of said primary hook 26, as best shown in Fig. 5. Surrounding the rock shaft 27 are two coiled springs 32 and 33, both of which are anchored to the base bar 1. The spring 32 reacts against the base bar 1 and the secondary escapement hook 29 in a direction to 70 normally hold the tripping arm 28 against the base bar 1, as shown in Fig. 5 and the spring 33 reacts against said base bar and against the rimary vhook 31 in a direction to normally iold said primary hook with its lug 30 pressed against the secondary hook 29.

The carrier arms 18 are provided with laterally projecting escapement pins 34 which, when said arms are moved from the left toward the right into the position shown in 8O Fig. 5, strike the beveled upper end of the primary hook 26 and operate with a camming action to force the said primary hook 26 toward the left, while the secondary hook 29 remains in its normal position, and thereby come into positions below the shoulder 31 of said hook 26 and thus become locked by the said primary hook.

When the tripping arm 28 is pressed downward with respect to Fig. 5, the free end of the secondary hook 29 is forced under the escapement pin 34 of the uppermost arm 18,

and directly over the escapement pin 34 of the arm 18 that is second from the top, and the said secondary hook acting on the lug 30 95 forces the primary hook toward the left, as shown by dotted lines in Fig. 5, and thereby releases the uppermost carrier arm 18, allowing the same to move under the tension of its spring 24 into its eXtreme position toward the left, thereby turning over the leaf which is held by the grapple jaws 25 thereof.

The tripping arm 28 might be provided with a finger-piece directly applied thereto, but preferably it is arranged to be tripped or depressed by a tripping bail 35, the transverse portion of which is journaled in small bearings 36 on the upper flange of the base bar 1 and having depending and forwardly turned arms that work through perforations in the base bar 1 and are secured to a linger bar 37 that is located in front of the base bar in position where it may be easily struck by a finger of either hand to thereby produce the escapement movement.

To prevent noise when the carrier arms 18 are released, a suitable cushioning stop is provided for intercepting the movements Y thereof at the left hand side of the base bar 1. rllhis stop is best shown in Figs. 9 and 10 120 wherein the numeral 38 indicates the step block having soft pads 39 of rubber, leather or other suitable material against which the carrier arms 18 are adapted to strike.

To hold the cover of the book or the outside leaves, coperating pairs of spring fingers 40-41 are applied to the upper flange of the base bar 1 near the ends thereof, as best shown in Figs. 1 and 13.

The device described has in actual practice heen found highly eiiicient for the purposes had in view.

What I claim is:

In a device ofthe kind described, the combination with a suitable support, of a multiplicity of spring actuated carrier arms pivotaily mounted on said support and provided With means for engaging and holding' the leaves to be turned, spring' pressed primary and secondary escapement hooks operative on said carrier arms to release the same in succession7 which secondary hook operates to move said primary hook in the escapement action, but which primary hook is capahle of independent movements for rengagement With said carrier arms, a trip arm connected to said secondary escapement hook, and a tripping hail mounted on said support, provided With a iinger bar and opera ative on said trip arm, substantially as de'- scribed.

In testimony Whereoic I ahiX my signature vin presence of two Witnesses.

JULIUS A. FRIEDRIOHS.

Witnesses :4

H. I". LEONARD, LORENZ L. MAYER. 

